I think that it was Stephen Hawking
NO it was your mum
Black Holes.
Black Holes are regions of space where gravitational acceleration if so great , that not even light can escape from it. Since like cannot escape from it , but only go into it , it does not show any light, but appears as a Black Hole. Although light is an electro-magnetic wave, it exists as particles called PHOTONS. It is these photons that fall into Black Holes. Black Holes may be thought of as regions of gravitational whirlpools. Gravitational acceleration throughout the universe is NOT uniform. There are regions of very strong gravitational acceleration and other regions of very poor or no gravitational acceleration. This 'clash' of gravities creates gravitational whirlpools (Black Holes). Think of it like a stream of water going over a rock bed. There are points were the water does not move and points were the water moves quite violently, and this creates whirlpools in the stream. Gravity in the universe may do just the same.
Even though black holes suck through parts of the universe, the universe is inevitably big, and growing so as the universe is being sucked into another dimension by black holes, it is also expanding.
There are already black holes within the universe
Black Holes' can 'eat' any type of matter in the Universe.
Probably stellar mass black holes
The universe likely contains millions upon millions of black holes.
No.
YES!!! How would we know they are there if we did not 'detect' them.
Stephen Hawking did not discover the law of everything, but he did have big ideas on how the universe began, and also on black holes.
The black holes may not devour everything since the outward velocity of the matter in the universe may escapethe gravitational pull of the black holes. Stephen Hawkins reckons that even the mass in the black holes would diminish over time, though over trillions and trillions of years.
Primordial black holes are theoretical black holes that could have formed in the early universe. They are thought to be small and have a wide range of masses. If they exist, they could have implications for dark matter, gravitational waves, and the evolution of the universe.